Nylas Quickstart

Set up the application

Visit https://developer.nylas.com/ to sign up for a Nylas Developer account. On the Nylas Developer dashboard, click on the “Settings” button, and in the “Callbacks” tab, add http://localhost:5000/login/nylas/authorized as a callback URL. Take note of the API ID and API Secret displayed on the dashboard.


from flask import Flask, redirect, url_for
from flask_dance.contrib.nylas import make_nylas_blueprint, nylas

app = Flask(__name__)
app.secret_key = "supersekrit"
nylas_bp = make_nylas_blueprint(
app.register_blueprint(nylas_bp, url_prefix="/login")

def index():
    if not nylas.authorized:
        return redirect(url_for("nylas.login"))
    resp = nylas.get("/account")
    assert resp.ok
    return "You are {name} on Nylas".format(name=resp.json()["name"])

if __name__ == "__main__":


You must replace my-key-here and my-secret-here with the API ID and API Secret that you got from the Nylas Developer dashboard.


If you are running this code on Heroku, you’ll need to use the werkzeug.contrib.fixers.ProxyFix middleware. See Proxies and HTTPS.

If you run this code locally or without HTTPS enabled (see warning below), you must set the OAUTHLIB_INSECURE_TRANSPORT environment variable to to disable the HTTPS requirement imposed by oauthlib, which is part of Flask-Dance. For example, if you put this code in a file named nylas.py on your machine, you could run:

$ python nylas.py

Visit `http://localhost:5000`_ in your browser, and you should start the OAuth dance immediately.


OAUTHLIB_INSECURE_TRANSPORT should only be used for local testing or over trusted connections. By default, all OAuth interactions must occur over secure https connections (this is enfored by oauthlib). However, setting OAUTHLIB_INSECURE_TRANSPORT disables this enforcement and allows OAuth to occur over insecure http connections.


This code makes a blueprint that implements the views necessary to be a consumer in the OAuth dance. The blueprint has two views: /nylas, which is the view that the user visits to begin the OAuth dance, and /nylas/authorized, which is the view that the user is redirected to at the end of the OAuth dance. Because we set the url_prefix to be /login, the end result is that the views are at /login/nylas and /login/nylas/authorized. The second view is the callback URL that you must tell Nylas about when you create your developer account.

The nylas variable is a requests.Session instance, which will be be preloaded with the user’s access token once the user has gone through the OAuth dance. You can check the nylas.authorized boolean to determine if the access token is loaded. Whether the access token is loaded or not, you can use all the normal requests methods, like get() and post(), to make HTTP requests. If you only specify the path component of the URL, the domain will default to https://api.nylas.com/.